Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b302cb0316ea6c7…

MALICIOUS

PDF

18.9 KB Created: 2021-05-21 18:32:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4059d49ce3da0fdb5110107fddf837af SHA-1: b4fbdffd08f5c6f80b447743cd7496faafa9384c SHA-256: 8b302cb0316ea6c703cdef3774441be03928cab7cf72c2066ef2647bd35bf2e9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a malicious domain, masquerading as a 'game hack' or 'free currency generator'. The document body and embedded links explicitly mention 'free Robux' and 'game hack', indicating a social engineering lure. The ML classifier also flagged this PDF as malicious, supporting the observed malicious behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9251

Heuristics 3

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/how-to-get-free-robux-2021-no-human-verification-game-hack In PDF document text
    • http://ukrainiansofbuffalo.com/images/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text

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